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// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ipn
import (
"sync"
"time"
"inet.af/netaddr"
"tailscale.com/tailcfg"
"tailscale.com/types/logger"
"tailscale.com/types/netmap"
)
type Handle struct {
b Backend
logf logger.Logf
// Mutex protects everything below
mu sync.Mutex
xnotify func(Notify)
frontendLogID string
netmapCache *netmap.NetworkMap
engineStatusCache EngineStatus
stateCache State
prefsCache *Prefs
}
func NewHandle(b Backend, logf logger.Logf, notify func(Notify), opts Options) (*Handle, error) {
h := &Handle{
b: b,
logf: logf,
}
h.SetNotifyCallback(notify)
err := h.Start(opts)
if err != nil {
return nil, err
}
return h, nil
}
func (h *Handle) SetNotifyCallback(notify func(Notify)) {
h.mu.Lock()
h.xnotify = notify
h.mu.Unlock()
h.b.SetNotifyCallback(h.notify)
}
func (h *Handle) Start(opts Options) error {
h.mu.Lock()
h.frontendLogID = opts.FrontendLogID
h.netmapCache = nil
h.engineStatusCache = EngineStatus{}
h.stateCache = NoState
if opts.Prefs != nil {
h.prefsCache = opts.Prefs.Clone()
}
h.mu.Unlock()
return h.b.Start(opts)
}
func (h *Handle) Reset() {
st := NoState
h.notify(Notify{State: &st})
}
func (h *Handle) notify(n Notify) {
h.mu.Lock()
if n.BackendLogID != nil {
h.logf("Handle: logs: be:%v fe:%v",
*n.BackendLogID, h.frontendLogID)
}
if n.State != nil {
h.stateCache = *n.State
}
if n.Prefs != nil {
h.prefsCache = n.Prefs.Clone()
}
if n.NetMap != nil {
h.netmapCache = n.NetMap
}
if n.Engine != nil {
h.engineStatusCache = *n.Engine
}
h.mu.Unlock()
if h.xnotify != nil {
// Forward onward to our parent's notifier
h.xnotify(n)
}
}
func (h *Handle) Prefs() *Prefs {
h.mu.Lock()
defer h.mu.Unlock()
return h.prefsCache.Clone()
}
func (h *Handle) UpdatePrefs(updateFn func(p *Prefs)) {
h.mu.Lock()
defer h.mu.Unlock()
new := h.prefsCache.Clone()
updateFn(new)
h.prefsCache = new
h.b.SetPrefs(new)
}
func (h *Handle) State() State {
h.mu.Lock()
defer h.mu.Unlock()
return h.stateCache
}
func (h *Handle) EngineStatus() EngineStatus {
h.mu.Lock()
defer h.mu.Unlock()
return h.engineStatusCache
}
func (h *Handle) LocalAddrs() []netaddr.IPPrefix {
h.mu.Lock()
defer h.mu.Unlock()
nm := h.netmapCache
if nm != nil {
return nm.Addresses
}
return []netaddr.IPPrefix{}
}
func (h *Handle) NetMap() *netmap.NetworkMap {
h.mu.Lock()
defer h.mu.Unlock()
return h.netmapCache
}
func (h *Handle) Expiry() time.Time {
h.mu.Lock()
defer h.mu.Unlock()
nm := h.netmapCache
if nm != nil {
return nm.Expiry
}
return time.Time{}
}
func (h *Handle) AdminPageURL() string {
return h.prefsCache.ControlURLOrDefault() + "/admin/machines"
}
func (h *Handle) StartLoginInteractive() {
h.b.StartLoginInteractive()
}
func (h *Handle) Login(token *tailcfg.Oauth2Token) {
h.b.Login(token)
}
func (h *Handle) Logout() {
h.b.Logout()
}
func (h *Handle) RequestEngineStatus() {
h.b.RequestEngineStatus()
}
func (h *Handle) FakeExpireAfter(x time.Duration) {
h.b.FakeExpireAfter(x)
}
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